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94 lines
3.2 KiB
Markdown
94 lines
3.2 KiB
Markdown
# Board - PixRacer
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PinOut diagrams are only for reference. See Ports and interfaces for true locations and mappings.
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## Top View PinOut
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## Bottom View PinOut
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Schematic : https://pixhawk.org/_media/modules/pixracer-r14.pdf
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## How to Flash
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PixRacer comes with NuttX Bootloader installed.
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To flash INAV follow the steps below
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* Short 3.3 V pad and GND pad located at Top(near Motor Pins)
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* Plug in via USB
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* Either use ziadag to get the correct the drivers for INAV based firmware flashing or use Dfuse to flash the correct firmware.
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If you want to revert back then PixRacer factory Loaded Bootloader Bin File for Dfuse : https://github.com/mkschreder/ardupilot/tree/master/mk/PX4/bootloader (download px4fmu4_bl.bin) or Build your own from :https://github.com/PX4/Bootloader
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Then follow this : https://pixhawk.org/dev/bootloader_update
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## Features
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### Processor and Sensors
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* 32-bit STM32F427 Cortex M4 core with FPU rev. 3 168 MHz/256 KB RAM/2 MB Flash
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* ICM-20608-G 3-axis accelerometer/gyroscope
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* MPU-9250 3-axis accelerometer/gyroscope/magnetometer
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* MEAS MS5611 barometer
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* Honeywell HMC5983 magnetometer temperature compensated
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### Interface and Ports
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Total UARTS Recognized by INAV -> 8
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#### USART1
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* Location : Top
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* Use: ESP8266 for Wifi OTA updates in Arducopter and PX4 AutoPilot
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* See Top View to find TX & RX
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* Only 3.3 volt peripherals will work unless your provide your own 5V BEC
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#### USART2
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* Location : Top
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* Use :Free Port
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* Runcam Device/Smart Audio and any other UART Peripheral should be supported
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#### USART3
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* Location : Top
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* Use :Free port
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* Runcam Device/Smart Audio and any other UART Peripheral should be supported
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#### USART 4
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* Location :
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* Use : I2C/GPS Port (WIP if you want to just use I2C)
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* Recommended to actually leave this port as is and not modify wires
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* GPS devices/ magnetometer and other I2C devices should be connected to this port
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* Till I2C is made available use as Free UART
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#### USART 5
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* Location : Top?
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* Use :CAN Bus?
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* Recommendation :CAN ESC?
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#### USART 6
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* Location : Top
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* Use : RC IN
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* Has RSS IN and and supports only PPM
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* RSS IN board is connected to PC1 pin of the F4 controller
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* RC input has been separated
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* PPM RC input is on PB0
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* Serial RC input is on PC7
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#### UART 7
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* Location : Bottom
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* Use :JTAG connector for debugging and bootloader/firmware flash
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* Unless you really know what you are doing leave this port alone
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* If you _really_ need another UART be aware, this port is limited to 3.3 volt
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#### USART 8
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* Location : Top
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* Use : Native FrSky port
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* Recommendation : Use for native FrSky telemetry
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## Buzzer
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You can connect the buzzer provide from factory to the default buzzer port
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### WIP
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* SD card (SDIO Bus)(Pins used are PC8, PC9, PC10, P11, PC12, PD 2)
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* Voltage Sensing (Connected to PA2)
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* Current Sensing (Connected to PA3)
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* HMC5983 compass (DRDY : PE12 , CS : PE15) (SPI bus pins : SCK on PB10 , MISO on PB14, MOSI on PB15) shares SPI bus with FRAM
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* FM25V02-G FRAM memory support (SPI bus pins : SCK on PB10 , MISO on PB14, MOSI on PB15)
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* I2C support (SCL on PB8 ,SDA on PB9)
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